From patchwork Tue Nov 17 13:05:47 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 325269 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2DC29C5519F for ; Tue, 17 Nov 2020 13:40:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C81ED2467A for ; Tue, 17 Nov 2020 13:40:26 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="JWy+DRX2" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728386AbgKQNkH (ORCPT ); Tue, 17 Nov 2020 08:40:07 -0500 Received: from mail.kernel.org ([198.145.29.99]:51956 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732592AbgKQNkG (ORCPT ); Tue, 17 Nov 2020 08:40:06 -0500 Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 431C120870; Tue, 17 Nov 2020 13:40:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1605620405; bh=3XWmxn9U1xhRWFyf9fS5ZKgz6mrzoLAAH9/EoQzrKbo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=JWy+DRX2Yw0lkZ3K8QOQgFpLW6qmb86lIX6OjfgWwZFIDEU3s1sthUcCb1F0NZ4JB d9m9MCErCztJrlGN/K75MKR/rMUyzTfHJPCoKLorjJsJg6JuHQXzmwle/7/fLsYa4l WcY29b11HJJhs9XVOTZt/5M3mvQq5v/CfuCjLnHk= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, stable@kernel.org, Theodore Tso Subject: [PATCH 5.9 207/255] jbd2: fix up sparse warnings in checkpoint code Date: Tue, 17 Nov 2020 14:05:47 +0100 Message-Id: <20201117122149.006290360@linuxfoundation.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201117122138.925150709@linuxfoundation.org> References: <20201117122138.925150709@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Theodore Ts'o commit 05d5233df85e9621597c5838e95235107eb624a2 upstream. Add missing __acquires() and __releases() annotations. Also, in an "this should never happen" WARN_ON check, if it *does* actually happen, we need to release j_state_lock since this function is always supposed to release that lock. Otherwise, things will quickly grind to a halt after the WARN_ON trips. Fixes: 96f1e0974575 ("jbd2: avoid long hold times of j_state_lock...") Cc: stable@kernel.org Signed-off-by: Theodore Ts'o Signed-off-by: Greg Kroah-Hartman --- fs/jbd2/checkpoint.c | 2 ++ fs/jbd2/transaction.c | 4 +++- 2 files changed, 5 insertions(+), 1 deletion(-) --- a/fs/jbd2/checkpoint.c +++ b/fs/jbd2/checkpoint.c @@ -106,6 +106,8 @@ static int __try_to_free_cp_buf(struct j * for a checkpoint to free up some space in the log. */ void __jbd2_log_wait_for_space(journal_t *journal) +__acquires(&journal->j_state_lock) +__releases(&journal->j_state_lock) { int nblocks, space_left; /* assert_spin_locked(&journal->j_state_lock); */ --- a/fs/jbd2/transaction.c +++ b/fs/jbd2/transaction.c @@ -195,8 +195,10 @@ static void wait_transaction_switching(j DEFINE_WAIT(wait); if (WARN_ON(!journal->j_running_transaction || - journal->j_running_transaction->t_state != T_SWITCH)) + journal->j_running_transaction->t_state != T_SWITCH)) { + read_unlock(&journal->j_state_lock); return; + } prepare_to_wait(&journal->j_wait_transaction_locked, &wait, TASK_UNINTERRUPTIBLE); read_unlock(&journal->j_state_lock);